CN109351399B

CN109351399B - Jaw plate stabilizing device and jaw crusher adopting same

Info

Publication number: CN109351399B
Application number: CN201811337577.6A
Authority: CN
Inventors: 朱黎; 尹如; 钟华; 程一海; 陆永斌
Original assignee: NANJING HEAO ELECTROMECHANICAL EQUIPMENT CO Ltd
Current assignee: NANJING HEAO ELECTROMECHANICAL EQUIPMENT CO Ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2023-09-22
Anticipated expiration: 2038-11-12
Also published as: CN109351399A

Abstract

The invention relates to a jaw plate stabilizing device and a jaw crusher adopting the same, and belongs to the technical field of crushing machinery. The jaw plate stabilizing device comprises a jaw plate, wherein one end of the jaw plate is hinged on a rack through an eccentric shaft, and the outer side of the other end of the jaw plate is fixedly connected with a mounting seat with a C-shaped section; the C-shaped opening of the mounting seat is internally provided with a bearing shaft fixed on the frame, and the width of the C-shaped opening is larger than the maximum outer diameter of the bearing shaft to form a compensation interval; a floating spring which tends to press the pressure bearing shaft and has adjustable pretightening degree is arranged in the compensation interval. Therefore, the jaw plate cannot deviate from the offset displacement of the overcompensation interval in the vibration process of the spring caused by impact force, so that smooth feeding and discharging are ensured, and blocking is effectively avoided; meanwhile, vibration deformation of the floating spring is limited, resonance caused by higher harmonics is effectively avoided, and the jaw plate is in a stable working state.

Description

Jaw plate stabilizing device and jaw crusher adopting same

Technical Field

The invention relates to a jaw crusher, in particular to a jaw plate stabilizing device and a jaw crusher adopting the same, and belongs to the technical field of crushing machinery.

Background

Jaw crushers are conventional machines in general which crush and crush large pieces of raw material by changing the jaw spacing by relative movement. The jaw crusher has a single-action jaw and a double-action jaw part according to the movement of the jaw plates. Typical structures can be found in Chinese patent application documents such as application number 201420727390.8. Further, the application date is 8/1/1995, and the patent number is US 5630555. The upper end and the lower end of two jaw plates of the machine are respectively arranged on the frame through eccentric shafts, the outer sides of the two jaw plates are propped against the surface of a lower regulating roller arranged on the frame, and an elastic pulling piece for pulling the jaw plates outwards is arranged between the eccentric shafts and the regulating roller; the regulating roller is arranged on the frame through a horizontal positioning mechanism.

In practice, when the size difference of the raw materials to be crushed is large, the jaw plate of the existing jaw crusher is inevitably abnormal in jumping phenomenon during working, so that the blocking of the raw materials to be crushed is easily caused, and the smooth working of the jaw crusher is influenced.

Disclosure of Invention

The invention aims at: aiming at the defects existing in the prior art, the jaw plate stabilizing device capable of effectively avoiding blocking caused by uneven sizes of raw materials to be crushed is provided, and further the jaw crusher adopting the device is provided, so that crushing efficiency and quality are guaranteed.

In order to achieve the purpose, the basic structure of the jaw plate stabilizing device comprises a jaw plate, one end of the jaw plate is hinged on a rack through an eccentric shaft, and the outer side of the other end of the jaw plate is fixedly connected with a mounting seat with a C-shaped section; the C-shaped opening of the mounting seat is internally provided with a bearing shaft fixed on the frame, and the width of the C-shaped opening is larger than the maximum outer diameter of the bearing shaft to form a compensation interval; a floating spring which tends to press the pressure bearing shaft and has adjustable pretightening degree is arranged in the compensation interval.

The jaw crusher adopting the jaw plate stable assembly comprises a pair of jaw plates capable of relatively moving, wherein one end of at least one jaw plate is hinged on a frame through an eccentric shaft, and the outer side of the other end is fixedly connected with a mounting seat with a C-shaped section; the C-shaped opening of the mounting seat is internally provided with a bearing shaft fixed on the frame, and the width of the C-shaped opening is larger than the maximum outer diameter of the bearing shaft to form a compensation interval; a floating spring which tends to press the pressure bearing shaft and has adjustable pretightening degree is arranged in the compensation interval.

Therefore, compared with the prior art, the C-shaped section mounting seat and the pressure bearing shaft directly form a constraint structure combining elastic constraint in the compensation interval range and double-side rigid constraint in the overspray range, and the original side is not limited by the elastic constraint of the tension spring, so that when the equivalent maximum outer diameter of the raw material to be crushed suddenly becomes large, the jaw plate cannot deviate from the compensation interval in the spring vibration process caused by impact force, thereby ensuring smooth feeding and discharging and effectively avoiding blocking; meanwhile, vibration deformation of the floating spring is limited, resonance caused by higher harmonics is effectively avoided, and the jaw plate is in a stable working state.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a jaw crusher according to an embodiment of the invention.

Fig. 2 is a schematic plan view of the embodiment of fig. 1.

Fig. 3 is a schematic view of the cross-sectional A-A structure of fig. 2.

Fig. 4 is a partially enlarged schematic view of the jaw plate stabilizing device of fig. 3.

Detailed Description

Example 1

The basic structure of the jaw crusher of this embodiment is shown in fig. 1, 2 and 3, the paired left and right jaw plates 1 and 1 'of two embedded convex arc plates are movable jaws, the lower ends and the upper ends of the jaw plates are hinged on a frame B through eccentric shafts 2 and 2' driven by external belts, and the outer sides of the other ends of the jaw plates are fixedly connected with mounting seats 3-1 with C-shaped cross sections respectively, so as to form jaw plate stabilizing devices 3.

As shown in fig. 4, the C-shaped opening of the mounting seat 3-1 is downward, the bearing shaft 3-4 fixed on the frame B is installed therein, and the width W of the C-shaped opening is larger than the maximum outer diameter D of the bearing shaft, forming the compensating space S. The upper part of the compensation interval is fixed with the upper edge of the plate spring 3-3 through a bolt, and the plate spring 3-3 is bent towards the outer side and then extends downwards to pass through the compensation interval S, and tends to press towards the bearing shaft 3-4 under the action of the top pressure pre-tightening of the upper and lower horizontal pressure regulating bolts 3-2 arranged on the outer side of the mounting seat 3-1. Since the thickness of the leaf spring 3-3 is smaller than the compensation interval, a floating leaf spring having a certain elastic deformation space is constituted.

When the plate spring is static, the inner side surface of the plate spring is tightly attached to the bearing shaft under the action of the pre-deformation pressure. When the device works, the mounting seat is integrated with the jaw plate and synchronously moves under the drive of the eccentric shaft, and the contact surface of the inner veneering of the plate spring and the bearing shaft relatively rubs and swings up and down. When materials with different sizes enter the two jaw plates to be directly crushed, the vibration generated during crushing the general materials is absorbed by the plate spring, and the outlet between the two jaw plates is basically unchanged. When large materials enter suddenly, the crusher in the prior art causes the jumping of the material outlet due to the large vibration generated on the upper part of the jaw plate, so that the inlet and the outlet are simultaneously and instantaneously reduced, the reduction of the feed inlet tends to prevent the large materials from falling down, and the jaw plate is in a full-floating shape at the moment, the extrusion crushing capacity is reduced, the materials are difficult to normally travel into the crushing area, and the blockage occurs as a result. When the structure of the embodiment generates large jumping trend due to large vibration, the plate spring is in a limited elastic deformation space, so that the plate spring has a forced resetting effect on the jaw plate, the instant reduction of a material inlet and a material outlet is avoided, the smoothness is always kept, and the crushing function is ensured to be stable.

In addition, because the plate spring of this embodiment is held with the help of upper and lower pressure regulating bolt pressure, not only can adjust the pretightning force as required, can adjust the laminating position of plate spring and pressure bearing axle in certain limit moreover to change the bearing direction of pressure bearing axle to the jaw, make it be in the state that is most favorable to the extrusion broken, this is the optimization adjustment function that prior art does not possess at all.

In addition to the embodiments described above, other embodiments of the invention are possible. For example, in addition to double acting jaws, a movable jaw and fixed jaw arrangement is also possible; for another example, the floating spring may be a leaf spring, a coil spring, a tension (or compression) coil spring, or the like. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.

Claims

1. The utility model provides a jaw stabilising arrangement, includes the jaw of one end through eccentric shaft hinge dress in the frame, its characterized in that: the outer side of the other end of the jaw plate is fixedly connected with a mounting seat with a C-shaped section; the C-shaped opening of the mounting seat is internally provided with a bearing shaft fixed on the frame, and the width of the C-shaped opening is larger than the maximum outer diameter of the bearing shaft to form a compensation interval; a floating spring which tends to press the pressure bearing shaft and has adjustable pretightening degree is arranged in the compensation interval.

2. The jaw plate stabilizing device of claim 1, wherein: the C-shaped opening of the mounting seat faces downwards, the upper edge of the plate spring is fixed on the upper portion of the compensation interval through a bolt, the plate spring downwards extends to pass through the compensation interval, and tends to press the bearing shaft under the action of the top pressure pre-tightening of the upper horizontal pressure regulating bolt and the lower horizontal pressure regulating bolt which are mounted on the outer side of the mounting seat.

3. The jaw plate stabilizing device of claim 2, wherein: the leaf spring extends downward after being bent toward the outside.

4. A jaw crusher employing jaw plate stabilizing means comprising a pair of jaw plates which are relatively movable, characterized in that: one end of at least one of the jaw plates is hinged on the frame through an eccentric shaft, and the outer side of the other end of the jaw plate is fixedly connected with a mounting seat with a C-shaped section; the C-shaped opening of the mounting seat is internally provided with a bearing shaft fixed on the frame, and the width of the C-shaped opening is larger than the maximum outer diameter of the bearing shaft to form a compensation interval; a floating spring which tends to press the pressure bearing shaft and has adjustable pretightening degree is arranged in the compensation interval.

5. Jaw crusher according to claim 4, characterized in that: the C-shaped opening of the mounting seat faces downwards, the upper edge of the plate spring is fixed on the upper portion of the compensation interval through a bolt, the plate spring downwards extends to pass through the compensation interval, and tends to press the bearing shaft under the action of the top pressure pre-tightening of the upper horizontal pressure regulating bolt and the lower horizontal pressure regulating bolt which are mounted on the outer side of the mounting seat.

6. Jaw crusher according to claim 5, characterized in that: the leaf spring extends downward after being bent toward the outside.

7. Jaw crusher according to any of the claims 4-6, characterized in that: the lower ends and the upper ends of the left jaw plate and the right jaw plate which are embedded in the two convex arc plates in pairs are hinged on the frame through eccentric shafts driven by external belts, and the outer sides of the other ends of the left jaw plate and the right jaw plate are fixedly connected with mounting seats with C-shaped sections respectively.